Lead Crystal Solar batteries

            3-EVFJ-210 (C3), 260Ahr (C10)   
                       6V Solar Battery  

For either a new system or replacing those tired old Lead Acids, these LC batteries should be the 1st choice. Able to withstand extreme temperatures, both high and low plus with a DOD to zero amps on occasions, these are the most robust batteries around today. Couple that with an amazing cycle life and an close to 1 to 1 charge to discharge ratio and take note that they are rated at C3 meaning they can dump massive current with no ill effects to voltage .